thoughtbot/hound — pull request #525 by malandrina (2014-12-19 22:06:14+00:00)
Title: Display failure status when config is invalid

* Hound users currently receive no feedback when their Ruby, JavaScript,
and CoffeeScript configuration files are invalid. This commit
introduces a new feature to address this disconnect:
When a config file is empty or can't be parsed, the GitHub status will
be changed to "failure".
* Validate repo config in `BuildRunner#run`. If config is invalid,
create failure status and create build record.
* Add `RepoConfig#validate` and `RepoConfig#errors`
* Add `GithubApi#create_failure_status`
* https://trello.com/c/JLt3FVUb/397-use-status-api-to-tell-user-when-custom-config-is-broken